code/game/objects/structures/signboards/holosign.dm 
| /proc/is_color_dark_with_saturation | Given a color in the format of "#RRGGBB", will return if the color is dark. Value is mixed with Saturation and Brightness from HSV. |
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| /proc/is_color_dark_with_saturation | Given a color in the format of "#RRGGBB", will return if the color is dark. Value is mixed with Saturation and Brightness from HSV. |
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